Slap Chop Charge 4 times the prize they said. Internet

I just bought the Slap Chop on internet, and it says that the prize is 19.95 dollars, and on my credit card they charge 80 dollars.

I called them and they start talking about some extra charges, and they told me that they could not do anything, and I read some complaints on Internet saying that they charge the same amount of money to them and in some other cases after a few weeks the start charging 5 dollars to their credit cards without any reason.

This people is stealing, saying a prize and then charging a lot more. Of course if they say that is 80 dollars and not 19,95 I will never bought this, and not just that, the Slap Chop doesn't work as they say it works, and it comes with a cheese grater that is impossible to use.